FallenAnjel , From the video links I posted, it does not look like to bad of job. Link 1&2 show how to, replacing key board and link 3 where to purchase board under $10.00. which you can also do a search, for better pricing or different options. Good luck.
I hope this helped you out, if so let me know by pressing the helpful button.
http://www.laptopkeyboard.com/Guides.php/Acer/Aspire/7741Z/KBAC10
https://www.youtube.com/watch?v=zEJ9kwbtCHw
http://www.ebay.com/itm/New-Laptop-Keyboard-Acer-Aspire-7551-7551G-7741-7741Z-7741ZG-8531-8571-8571G-USA-/200578108575